Manufacturing Engineering & Technology
Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 19, Problem 42QTP

Estimate the die-clamping force required for injection molding five identical 8-in.-diameter disks in one die. Include the runners of appropriate length and diameter.

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3. A dimension of 225.00 mm is specified for a particular injection moulded component manufactured in ABS. Calculate the corresponding dimension to which the mould cavity should be machined, using the value of shrinkage given in the table below. Typical values of shrinkage for moldings of selected thermoplastics. Shrinkage, mm/mm (in/in) Shrinkage, Plastic Plastic mm/mm (in/in) ABS Polyethylene Polystyrene 0.006 0.025 Nylon-6,6 Polycarbonate 0.020 0.004 0.007 PVC 0.005
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An extrusion operation is used to produce a parison whose mean diameter = 27 mm. The inside and outside diameters of the die that produced the parison are 18 mm and 22 mm, respectively. If the minimum wall thickness of the blow-molded container is to be 0.40 mm, what is the maximum possible diameter of the blow mold?

Chapter 19 Solutions

Manufacturing Engineering & Technology

Ch. 19 - Describe runner, gate, sprue, and well.Ch. 19 - Describe the advantages of cold-forming plastics...Ch. 19 - What are the characteristics of filament-wound...Ch. 19 - Describe the methods that can be used to make...Ch. 19 - What is pultrusion? Pulforming?Ch. 19 - How are very thin plastic film produced?Ch. 19 - What process is used to make foam drinking cups?Ch. 19 - If a polymer is in the form of a thin sheet, is it...Ch. 19 - How are polymer fibers made? Why are they much...Ch. 19 - What are the advantages of coextrusion?Ch. 19 - Explain how latex rubber gloves are made.Ch. 19 - Describe the features of a screw extruder...Ch. 19 - Explain why injection molding is capable of...Ch. 19 - Prob. 24QLPCh. 19 - Explain the reasons that some plastic-forming...Ch. 19 - Describe the problems involved in recycling...Ch. 19 - Can thermosetting plastics be used in injection...Ch. 19 - Inspect some plastic containers, such as those...Ch. 19 - An injection-molded nylon gear is found to contain...Ch. 19 - Explain why operations such as blow molding and...Ch. 19 - Prob. 31QLPCh. 19 - Typical production rates are given in Table 19.2....Ch. 19 - What determines the cycle time for (a) injection...Ch. 19 - Does the pull-in defect (sink marks) shown in Fig....Ch. 19 - What determines the intervals at which the...Ch. 19 - Identify processes that would be suitable for...Ch. 19 - Identify processes that are capable of producing...Ch. 19 - Inspect several electrical components, such as...Ch. 19 - Inspect several similar products that are made of...Ch. 19 - What are the advantages of using whiskers a...Ch. 19 - Construct a table that lists the main...Ch. 19 - Estimate the die-clamping force required for...Ch. 19 - A 2-Iitcr plastic beverage bottle is made by blow...Ch. 19 - Consider a Styrofoam drinking cup. Measure the...Ch. 19 - In Fig. 19.2, what flight angle, , should be used...Ch. 19 - Make a survey of a variety of sports equipment,...Ch. 19 - Explain the design considerations involved in...Ch. 19 - Give examples of several parts suitable for insert...Ch. 19 - Give other examples of design modifications in...Ch. 19 - With specific examples, discuss the design issues...Ch. 19 - Die swell in extrusion is radially uniform for...Ch. 19 - Inspect various plastic components in a typical...Ch. 19 - It is well known that plastic forks, spoons, and...Ch. 19 - Prob. 55SDPCh. 19 - Make a survey of the technical literature, and...Ch. 19 - Prob. 57SDPCh. 19 - Prob. 58SDPCh. 19 - Prob. 59SDPCh. 19 - Examine some common and colorful plastic poker...Ch. 19 - Obtain different styles of toothpaste tubes,...Ch. 19 - By incorporating small amounts of blowing agent,...
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